My Inquiry
My Account
Analog Devices Inc. REF198ES
- Part No.:
- REF198ES
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF198ES.pdf
- Description:
- IC VREF SERIES 0.05% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,950
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
REF198ES from Analog Devices is a precision micropower low-dropout voltage reference IC delivering a stable 4.096 V output with ±2 mV initial accuracy, 5 ppm/°C max temperature coefficient, and 30 mA output current capability. It operates from supplies as low as 100 mV above its output voltage and supports sleep mode (15 μA) for ultra-low-power portable instrumentation and loop-powered sensor systems.
For engineers reviewing the REF198ES datasheet, REF198ES pinout, REF198ES application, or REF198ES equivalent, key selection criteria include dropout voltage at 10 mA load (≤1.25 V), load regulation (≤4 ppm/mA), line regulation (≤4 ppm/V), and compatibility with Kelvin-sensing configurations in high-accuracy ADC/DAC biasing circuits.
Technical Context
The REF198ES uses a patented curvature-corrected band gap core with laser-trimmed thin-film resistors to achieve low drift across −40°C to +85°C. Its SLEEP pin enables TTL/CMOS-compatible shutdown, reducing supply current to ≤15 μA while disabling output.
Designed for operation with only a 1 μF output bypass capacitor, it features short-circuit protection and exhibits 45 μA max quiescent current in active mode. The device maintains specified performance over extended industrial temperature range and supports typical operation up to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Output Voltage | 4.096 V - precisely matches 12-bit full-scale ADC reference for zero-code alignment. |
| Initial Accuracy | ±2 mV maximum - enables direct use in 12-bit systems without calibration. |
| Temp Coefficient | 5 ppm/°C max - contributes ≤0.5 LSB drift over 0–70°C in 12-bit applications. |
| Dropout Voltage | 1.25 V at 10 mA - allows operation from 5.35 V supply in 5 V systems with margin. |
| Supply Current | 45 μA max active / 15 μA max sleep - extends battery life in solar- or loop-powered sensors. |
| Load Regulation | 4 ppm/mA - ensures <0.02 mV shift per mA load change, critical for precision current sources. |
| Line Regulation | 4 ppm/V - limits output variation to <0.02 mV per volt input change, supporting unregulated supplies. |
Pinout & Package
The REF198ES is packaged in an 8-lead SOIC_N (S suffix) with exposed pad option not specified; pin 1 and pin 5 are factory test points and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (TP) | Factory Test Point | Zener-zap trim node; no user connection - floating or tied to GND degrades accuracy. |
| 2 (VS) | Positive Supply Input | Accepts 4.196 V to 15 V; dropout as low as 100 mV above 4.096 V output. |
| 3 (SLEEP) | Digital Enable Control | Active-low TTL/CMOS input; <0.8 V disables output and reduces IQ to ≤15 μA. |
| 4 (GND) | Analog Ground Reference | Return path for output and internal circuitry; requires low-impedance Kelvin connection. |
| 5 (TP) | Factory Test Point | Second Zener-zap node; must be left unconnected to preserve trimmed output voltage. |
| 6 (NC) | No Connect | Internally unused; must remain open - no routing or grounding permitted. |
| 7 (NC) | No Connect | Internally unused; must remain open - no routing or grounding permitted. |
| 8 (OUTPUT) | Precision Voltage Output | Delivers regulated 4.096 V; requires 1 μF ceramic capacitor to GND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-Corrected Band Gap Core | Enables 5 ppm/°C max TCVO over −40°C to +85°C without external compensation. |
| Laser-Trimmed Thin-Film Resistors | Guarantees ±2 mV initial accuracy without post-assembly calibration. |
| Low-Dropout Operation | Supports 4.196 V minimum input for 4.096 V output - ideal for single-cell Li-ion or 5 V rail-limited designs. |
| Sleep Mode Control | Reduces supply current from 45 μA to ≤15 μA via logic-level SLEEP pin, enabling duty-cycled precision sensing. |
| Short-Circuit Protected Output | Withstands indefinite output-to-GND fault without damage or parameter shift. |
Applications
| Portable Instrumentation | High-Resolution ADC Biasing |
|---|---|
|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and coin-cell battery supply. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and internal DAC calibration. Use Value: 4.096 V output aligns with 212 = 4096 LSB scaling; 45 μA supply current extends battery life beyond 1 year. |
Use Scenario: Industrial data acquisition module using 16-bit sigma-delta ADC with PGA front-end. IC Role / Device Role / Timing Role: Stable reference source for ADC reference input and PGA gain-setting resistor network. Use Value: 4 ppm/mA load regulation prevents code-dependent offset shifts during varying ADC input currents. |
| Smart Sensor Transmitters | Solar-Powered Remote Monitoring |
|
Use Scenario: 4–20 mA loop-powered temperature transmitter with HART digital overlay. IC Role / Device Role / Timing Role: Precision reference for RTD excitation current generation and ADC reference. Use Value: Sleep mode (15 μA) enables microcontroller-initiated wake-up for periodic measurements, minimizing loop power draw. |
Use Scenario: Wireless environmental sensor node powered by small photovoltaic cell and supercapacitor. IC Role / Device Role / Timing Role: Low-quiescent reference for analog signal conditioning prior to RF transmission. Use Value: 100 mV dropout enables operation when supercapacitor voltage drops to 4.196 V, maximizing energy utilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3440BRMZ | 4.096 V output, 3 ppm/°C max TC, 45 μA IQ, but no SLEEP pin or short-circuit protection. | Higher accuracy in stable-temperature environments; unsuitable for sleep-controlled or fault-prone systems. | Choose ADR3440BRMZ when TC is primary concern and system lacks sleep control logic. |
| MAX6126AASA41 | 4.096 V output, 3 ppm/°C max TC, 120 μA IQ, no sleep mode, SO-8 package. | Better TC but higher supply current; lacks integrated short-circuit protection and sleep enable. | Choose MAX6126AASA41 when long-term stability dominates over power budget and fault tolerance. |
Compared with ADR3440BRMZ and MAX6126AASA41, REF198ES uniquely combines sleep-mode power reduction (15 μA), short-circuit resilience, and 5 ppm/°C TC in a single SOIC package-making it optimal for battery-constrained, field-deployed instrumentation requiring robustness and configurability.
Availability
REF198ES is available at Aetrix Electronics and suitable for portable instrumentation, high-resolution ADC biasing, and smart sensor transmitters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for REF198ES includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The REF19x series was designed specifically for micropower, low-dropout precision voltage referencing in space- and energy-constrained systems such as portable test equipment and loop-powered industrial sensors.
FAQ
What is the nominal output voltage of the REF198ES?
The REF198ES provides a nominal output voltage of 4.096 V, optimized for 12-bit analog-to-digital conversion where 4096 steps align directly with full-scale range. This value is laser-trimmed and guaranteed within ±2 mV at 25°C across all grades, and remains stable over −40°C to +85°C with ≤5 ppm/°C temperature coefficient.
Does the REF198ES require an external output capacitor?
Yes, the REF198ES requires a minimum 1 μF ceramic capacitor connected between the OUTPUT and GND pins for stability and noise reduction. This capacitor must be placed as close as possible to the device; omitting it may cause oscillation or degraded load regulation. The datasheet specifies no ESR requirement, making X7R or C0G dielectrics acceptable.
How does the SLEEP pin function on the REF198ES?
The SLEEP pin on the REF198ES is an active-low TTL/CMOS-compatible control input. Driving it below 0.8 V disables the output and reduces supply current to ≤15 μA; pulling it above 2.4 V enables normal operation with ≤45 μA supply current. The pin draws ≤8 μA in either state, enabling direct interface with low-power microcontrollers without level-shifting.
Can the REF198ES be used in automotive applications?
The REF198ES is characterized for operation from −40°C to +125°C and exhibits typical performance across that range, including 10 ppm/°C max temperature coefficient at +125°C. While not AEC-Q200 qualified, its extended temperature capability supports under-hood sensor signal conditioning and infotainment subsystems where qualification is handled at board or system level.
What is the minimum input voltage required for the REF198ES to regulate properly?
The REF198ES achieves regulation with a minimum headroom of 100 mV above its 4.096 V output, meaning VS ≥ 4.196 V under no-load conditions. At 10 mA load, the dropout voltage is specified at 1.25 V (VS − VO), requiring VS ≥ 5.346 V. This low-dropout behavior enables use in systems with tightly constrained supply margins, such as single-cell Li-ion or buck-regulated 5 V rails.
REF198ES Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- REF19
- Packaging:
- Tube
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 30 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 40µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 4.5V ~ 15V
- Current - Supply:
- 45µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF198ES FAQ
1.How can I place an order for REF198ES through Aetrix?
Please submit a Request for Quotation (RFQ) for REF198ES on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for REF198ES reliable?
The price and inventory of REF198ES are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF198ES is usually 5 days.
3.What payment methods are accepted for REF198ES?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF198ES transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF198ES?
REF198ES orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF198ES order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for REF198ES?
For technical support, including REF198ES datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF198ES requirements.
6.How does Aetrix verify that REF198ES is sourced from the original manufacturer or authorized distributors?
All REF198ES products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that REF198ES meets industry standards.
7.What is the process for return or replacement of REF198ES?
All REF198ES units undergo pre-shipment inspection (PSI). If there is an issue with REF198ES, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The REF198ES part is unused and in its original packaging.
Return procedure for REF198ES:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF198ES Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
